Two Dimensional Subsonic Wind Tunnel Tests on a 20 Percent Thick, 5 Percent Cambered Circulation Control Airfoil

Abstract

An experimental program was undertaken to develop circulation control, high lift airfoils for rotary wing vehicle application. The basic method used to eject a thin jet sheet of air tangentially over the rounded trailing edge of a thick airfoil, usually of modified elliptic cross section. The jet sheet remains attached to the rounded trailing edge, separating, eventually, on the underside. The report presents results for cambered ellipse. Lift, drag and section equivalent lift-drag ratio data are presented which indicate that this model is one of the most efficient high lift airfoils yet tested.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1970
Accession Number
AD0877764

Entities

People

  • Harvey J. Howe
  • Robert M. Williams

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Aircrafts
  • Airfoils
  • Boundary Layer
  • High Lift
  • High Lift Devices
  • Leading Edges
  • Potential Flow
  • Pressure Distribution
  • Pressure Gradients
  • Reynolds Number
  • Subsonic Wind Tunnels
  • Test Facilities
  • Three Dimensional
  • Trailing Edges
  • Two Dimensional
  • Wind Tunnel Tests
  • Wind Tunnels

Fields of Study

  • Physics

Readers

  • Combustion and Flow Dynamics.
  • Electrical Engineering